diff options
Diffstat (limited to 'scripts/mod/modpost.h')
| -rw-r--r-- | scripts/mod/modpost.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h new file mode 100644 index 000000000..8453d6ac2 --- /dev/null +++ b/scripts/mod/modpost.h @@ -0,0 +1,194 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/mman.h> +#include <fcntl.h> +#include <unistd.h> +#include <elf.h> + +#include "elfconfig.h" + +/* On BSD-alike OSes elf.h defines these according to host's word size */ +#undef ELF_ST_BIND +#undef ELF_ST_TYPE +#undef ELF_R_SYM +#undef ELF_R_TYPE + +#if KERNEL_ELFCLASS == ELFCLASS32 + +#define Elf_Ehdr Elf32_Ehdr +#define Elf_Shdr Elf32_Shdr +#define Elf_Sym Elf32_Sym +#define Elf_Addr Elf32_Addr +#define Elf_Sword Elf64_Sword +#define Elf_Section Elf32_Half +#define ELF_ST_BIND ELF32_ST_BIND +#define ELF_ST_TYPE ELF32_ST_TYPE + +#define Elf_Rel Elf32_Rel +#define Elf_Rela Elf32_Rela +#define ELF_R_SYM ELF32_R_SYM +#define ELF_R_TYPE ELF32_R_TYPE +#else + +#define Elf_Ehdr Elf64_Ehdr +#define Elf_Shdr Elf64_Shdr +#define Elf_Sym Elf64_Sym +#define Elf_Addr Elf64_Addr +#define Elf_Sword Elf64_Sxword +#define Elf_Section Elf64_Half +#define ELF_ST_BIND ELF64_ST_BIND +#define ELF_ST_TYPE ELF64_ST_TYPE + +#define Elf_Rel Elf64_Rel +#define Elf_Rela Elf64_Rela +#define ELF_R_SYM ELF64_R_SYM +#define ELF_R_TYPE ELF64_R_TYPE +#endif + +/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */ +typedef struct +{ + Elf32_Word r_sym; /* Symbol index */ + unsigned char r_ssym; /* Special symbol for 2nd relocation */ + unsigned char r_type3; /* 3rd relocation type */ + unsigned char r_type2; /* 2nd relocation type */ + unsigned char r_type1; /* 1st relocation type */ +} _Elf64_Mips_R_Info; + +typedef union +{ + Elf64_Xword r_info_number; + _Elf64_Mips_R_Info r_info_fields; +} _Elf64_Mips_R_Info_union; + +#define ELF64_MIPS_R_SYM(i) \ + ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym) + +#define ELF64_MIPS_R_TYPE(i) \ + ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1) + +#if KERNEL_ELFDATA != HOST_ELFDATA + +static inline void __endian(const void *src, void *dest, unsigned int size) +{ + unsigned int i; + for (i = 0; i < size; i++) + ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1]; +} + +#define TO_NATIVE(x) \ +({ \ + typeof(x) __x; \ + __endian(&(x), &(__x), sizeof(__x)); \ + __x; \ +}) + +#else /* endianness matches */ + +#define TO_NATIVE(x) (x) + +#endif + +#define NOFAIL(ptr) do_nofail((ptr), #ptr) +void *do_nofail(void *ptr, const char *expr); + +struct buffer { + char *p; + int pos; + int size; +}; + +void __attribute__((format(printf, 2, 3))) +buf_printf(struct buffer *buf, const char *fmt, ...); + +void +buf_write(struct buffer *buf, const char *s, int len); + +struct module { + struct module *next; + const char *name; + int gpl_compatible; + struct symbol *unres; + int seen; + int skip; + int has_init; + int has_cleanup; + struct buffer dev_table_buf; + char srcversion[25]; + int is_dot_o; +}; + +struct elf_info { + unsigned long size; + Elf_Ehdr *hdr; + Elf_Shdr *sechdrs; + Elf_Sym *symtab_start; + Elf_Sym *symtab_stop; + Elf_Section export_sec; + Elf_Section export_unused_sec; + Elf_Section export_gpl_sec; + Elf_Section export_unused_gpl_sec; + Elf_Section export_gpl_future_sec; + char *strtab; + char *modinfo; + unsigned int modinfo_len; + + /* support for 32bit section numbers */ + + unsigned int num_sections; /* max_secindex + 1 */ + unsigned int secindex_strings; + /* if Nth symbol table entry has .st_shndx = SHN_XINDEX, + * take shndx from symtab_shndx_start[N] instead */ + Elf32_Word *symtab_shndx_start; + Elf32_Word *symtab_shndx_stop; +}; + +static inline int is_shndx_special(unsigned int i) +{ + return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE; +} + +/* + * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of + * the way to -256..-1, to avoid conflicting with real section + * indices. + */ +#define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1)) + +/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */ +static inline unsigned int get_secindex(const struct elf_info *info, + const Elf_Sym *sym) +{ + if (is_shndx_special(sym->st_shndx)) + return SPECIAL(sym->st_shndx); + if (sym->st_shndx != SHN_XINDEX) + return sym->st_shndx; + return info->symtab_shndx_start[sym - info->symtab_start]; +} + +/* file2alias.c */ +extern unsigned int cross_build; +void handle_moddevtable(struct module *mod, struct elf_info *info, + Elf_Sym *sym, const char *symname); +void add_moddevtable(struct buffer *buf, struct module *mod); + +/* sumversion.c */ +void maybe_frob_rcs_version(const char *modfilename, + char *version, + void *modinfo, + unsigned long modinfo_offset); +void get_src_version(const char *modname, char sum[], unsigned sumlen); + +/* from modpost.c */ +void *grab_file(const char *filename, unsigned long *size); +char* get_next_line(unsigned long *pos, void *file, unsigned long size); +void release_file(void *file, unsigned long size); + +void fatal(const char *fmt, ...); +void warn(const char *fmt, ...); +void merror(const char *fmt, ...); |